Unfortunately, there is no automatic way of resetting points or reputation as far as I know. You will have to reset points of members individually in the admin panel. As for reputation, I will try to look into it.

@Derri wrote:Yeah I didn't think you could do rep. I think I asked that along time ago. And I'm aware you can manually do it for points.

Well there's the suggestion section, you may post a suggestion to add this feature. Cause it's really helpful when you got an issue/problem on your forum with thousands of users that you might need to reset everything.